package textsecure;

option java_package = "org.whispersystems.libaxolotl.state";
option java_outer_classname = "StorageProtos";

message SessionStructure {
    message Chain {
        optional bytes senderEphemeral = 1;
        optional bytes senderEphemeralPrivate = 2;

        message ChainKey {
            optional uint32 index = 1;
            optional bytes  key   = 2;
        }

        optional ChainKey chainKey = 3;

        message MessageKey {
            optional uint32 index     = 1;
            optional bytes  cipherKey = 2;
            optional bytes  macKey    = 3;
        }

        repeated MessageKey messageKeys = 4;
    }

    message PendingKeyExchange {
        optional uint32 sequence                 = 1;
        optional bytes  localBaseKey             = 2;
        optional bytes  localBaseKeyPrivate      = 3;
        optional bytes  localEphemeralKey        = 4;
        optional bytes  localEphemeralKeyPrivate = 5;
        optional bytes  localIdentityKey         = 7;
        optional bytes  localIdentityKeyPrivate  = 8;
    }

    message PendingPreKey {
        optional uint32 preKeyId = 1;
        optional bytes  baseKey  = 2;
    }

    optional uint32 sessionVersion      = 1;
    optional bytes localIdentityPublic  = 2;
    optional bytes remoteIdentityPublic = 3;

    optional bytes rootKey              = 4;
    optional uint32 previousCounter     = 5;

    optional Chain senderChain          = 6;
    repeated Chain receiverChains       = 7;

    optional PendingKeyExchange pendingKeyExchange = 8;
    optional PendingPreKey      pendingPreKey      = 9;

    optional uint32 remoteRegistrationId = 10;
    optional uint32 localRegistrationId  = 11;

    optional bool needsRefresh = 12;
}

message RecordStructure {
    optional SessionStructure currentSession   = 1;
    repeated SessionStructure previousSessions = 2;
}

message PreKeyRecordStructure {
    optional uint32 id        = 1;
    optional bytes  publicKey = 2;
    optional bytes  privateKey = 3;
}

message IdentityKeyPairStructure {
    optional bytes publicKey  = 1;
    optional bytes privateKey = 2;
}